optical imaging system

An optical imaging system and imaging surface technology, applied in optics, optical components, instruments, etc., can solve the problems of high positioning accuracy and inability to correct f-theta distortion strictly, and achieve the effect of high positioning accuracy and high imaging quality

Active Publication Date: 2020-07-03
ZHEJIANG SUNNY OPTICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most traditional lenses cannot achieve strict correction of f-theta distortion, so they cannot achieve high positioning accuracy while obtaining better image quality

Method used

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Effect test

Embodiment 1

[0069] Refer to the following Figure 1 to Figure 2C An optical imaging system according to Embodiment 1 of the present application is described. figure 1 A schematic structural diagram of an optical imaging system according to Embodiment 1 of the present application is shown.

[0070] Such as figure 1 As shown, the optical imaging system according to the exemplary embodiment of the present application includes sequentially along the optical axis from the object side to the image side: a first lens E1, a second lens E2, a diaphragm STO, a third lens E3, and a fourth lens E4 , the fifth lens E5, the sixth lens E6, the filter E7 and the imaging surface S15.

[0071]The first lens E1 has negative refractive power, its object side S1 is concave, the image side S2 is concave, and the object side S1 has an inflection point; the second lens E2 has positive refractive power, its object side S3 is convex, and the image side S3 is convex. S4 is a concave surface; the third lens E3 ha...

Embodiment 2

[0097] Refer to the following Figure 3 to Figure 4C An optical imaging system according to Embodiment 2 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, descriptions similar to those in Embodiment 1 will be omitted. image 3 A schematic structural diagram of an optical imaging system according to Embodiment 2 of the present application is shown.

[0098] Such as image 3 As shown, the optical imaging system according to the exemplary embodiment of the present application includes sequentially along the optical axis from the object side to the image side: a first lens E1, a second lens E2, a diaphragm STO, a third lens E3, and a fourth lens E4 , the fifth lens E5, the sixth lens E6, the filter E7 and the imaging surface S15.

[0099] The first lens E1 has negative refractive power, its object side S1 is concave, the image side S2 is concave, and the object side S1 has an inflection point; the second lens E2 ...

Embodiment 3

[0112] Refer to the following Figure 5 to Figure 6C An optical imaging system according to Embodiment 3 of the present application is described. Figure 5 A schematic structural diagram of an optical imaging system according to Embodiment 3 of the present application is shown.

[0113] Such as Figure 5 As shown, the optical imaging system according to the exemplary embodiment of the present application includes sequentially along the optical axis from the object side to the image side: a first lens E1, a second lens E2, a diaphragm STO, a third lens E3, and a fourth lens E4 , the fifth lens E5, the sixth lens E6, the filter E7 and the imaging surface S15.

[0114] The first lens E1 has negative refractive power, its object side S1 is concave, the image side S2 is concave, and the object side S1 has an inflection point; the second lens E2 has positive refractive power, its object side S3 is convex, and the image side S3 is convex. S4 is a concave surface; the third lens E3...

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Abstract

An optical imaging system, which successively comprises along an optical axis from an object side to an image side: a first lens (E1), a second lens (E2), a third lens (E3), a fourth lens (E4), a fifth lens (E5), and a sixth lens (E6). The first lens (E1) has negative refractive power, and an image side surface (S2) thereof is a concave surface; the second lens (E2) has positive refractive power; the third lens (E3) has positive refractive power, and an object side surface (S5) and image side surface (S6) thereof are both convex surfaces; the fourth lens (E4) has refractive power; the fifth lens (E5) has refractive power; the sixth lens (E6) has refractive power, an object side surface (S11) thereof is a convex surface, and an image side surface (S12) thereof is a concave surface. A maximum effective semi-diamater DT12 of the image side surface (S2) of the first lens (E1) and a half ImgH of the diagonal length of an effective pixel area on an imaging surface (S15) of the optical imaging system meets 0<DT12 / ImgH<1.

Description

technical field [0001] The present application relates to an optical imaging system, and more particularly, the present application relates to an optical imaging system including six lenses. Background technique [0002] In recent years, imaging lenses equipped with commonly used photosensitive elements such as photosensitive coupling devices (CCD) or complementary metal oxide semiconductor devices (CMOS) have been widely used in various fields. These lenses can not only be used to capture images, but also can be used for spatial positioning. technology. However, most traditional lenses cannot achieve strict correction of f-θ distortion, so they cannot achieve high positioning accuracy while obtaining better image quality. [0003] At the same time, with the improvement of the performance and the reduction of the size of commonly used photosensitive elements such as CCD or CMOS, the number of pixels of the photosensitive element increases and the size of the pixel decreases...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/00G02B13/06G02B13/18
CPCG02B13/0045G02B13/06G02B13/18
Inventor 王新权
Owner ZHEJIANG SUNNY OPTICAL CO LTD
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